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CH-0793076, a hexacyclic camptothecin analog, is an active drug and major metabolite of TP300. CH-0793076 is efficacious against cells expressing BCRP (breast cancer resistance protein). CH-0793076 inhibits DNA topoisomerase I (IC50: 2.3 μM).

CH-0793076 (TP3076) TFA，喜树碱的六环类似物，是 TP300 的活性药物和主要代谢物。CH-0793076 TFA 抑制 DNA 拓扑异构酶 I (DNAtopoisomeraseI)，IC50为 2.3 μM。CH-0793076 TFA 对表达 BCRP(乳腺癌耐药蛋白) 的细胞也有活性。